著者
村岡慶裕
所属
題材
計測法
被検体
ヒト
データ収集方法
実験
専門分野
生体工学
評価指標
キーワード
歩行分析脳卒中運動学習臨床計測
概要

書誌: Clinics and Practice , 2013

S.Tanabe, E.Saitoh, K.Ohtsuka, T.Teranishi, Y.Tomita, and Y.Muraoka, 2013. Simple method  to reduce the effect of patient positioning variation on three-dimensional motion analysis  during treadmill gait. Vol.3, No.2, 84-86

Abstract

Recently, three-dimensional (3D) closed curve trajectories of markers placed at strategic body locations, called  cyclograms or Lissajous-like graphs, are used for treadmill gait analysis. A simple method is presented to reduce the effect of patient positioning variation. After breaking down movement into three components (anterior-posterior, medial-lateral and superior-inferior), the time-series data and time-inverted data are serially concatenated. A fast Fourier transform (FFT) is done, and a high-pass filter (except 0 Hz) is applied to the anterior-posterior and medial-lateral components. Next an inverse FFT is executed, and the posterior half of the outcome, corresponding to time-inverted data, is deleted. The 3D closed curve is then reconstructed. Results showed that the proposed method was able to reduce the effect of patient positioning variation. Since the adjusted curve is simply a symbolized gait pattern, the method might be useful as an adjunct tool in observational gait analysis.

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2015年02月02日 00:06
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